20 GHz Lightwave Transmitter Module for RFoF (LTA-20)

Data Sheet

Product Overview

The Optilab LTA-20 is a high performance Lightwave Transmitter Module designed for analog photonics applications from DC to 20 GHz. This unit includes a 18 GHz optical intensity modulator and an Automatic Bias Control (ABC) board with four different operating modes. The external laser source can be any polarization maintaining device, such as tunable laser, narrow linewidth laser, making it a versatile solution for RFoF system integration. Contact Optilab for more information.


  • Analog photonics
  • 20 GHz RFoF transmission
  • RF/IF Signal Distribution
  • Satellite Communication
  • Optical communications to 25 Gb/s
  • Sub-nanosecond pulse generation


  • 18 GHz S21 bandwidth modulator
  • 1520 nm to 1610 nm wavelength range
  • Automatic Bias Control w/ 4 mode operation
  • Internal DFB laser up to 50 mW
  • Customizable options: Low Drive Voltage, PM Output, High Extinction Ratio (>30 dB), Temperature Qualified (-55 °C to +75 °C)

Feature Name Description
General Specifications
Operating Wavelength 1520 nm to 1610 nm
Laser Source Internal DFB laser, 1550nm±10 nm; other wavelegth and narrow linewidth <1 MHz are available
Laser Power Level 20 mW, 30 mW, 40 mW, 50 mW
RF Return Loss >15 dB @ 10 GHz; >10 dB @ 20 GHz
Impedance 50 Ω
Operating Frequency Range DC to 25 GHz
Input RF Voltage 27 dBm max.
Optical Output Level 6.5 dBm typ. with 20 mW DFB
S21 Bandwidth 3 dB, 2GHz to 18 GHz typ.
Modulator Bias Mode 4 Automatic bias control modes, selectable by software
Extinction Ratio 25 dB typ.; >30 dB (HE version)
Modulator Voltage VPI 7 V typ. @ 10 GHz; 5.5 V typ. @ 10 GHz (LD version)
Analog Link Performance
IIP3 @7 GHz 32 dBm typ.; 29 dBm typ. (LD version)
1 dB Conpression Point @10 GHz 16.5 dBm typ.; 14.5 dBm typ. (LD Version)
Mechanical Specifications
Operating Temperature (Standard) -30 °C to +60 °C
Operating Temperature (TQ) -55 °C to +75 °C
Storage Temperature -60 °C to +90 °C
Power Supply Requirements ±5V, 1A typ.
Optical Connectors FC/APC
Fiber Type SMF-28 output; PANDA output (PM version)
RF Input Connector K connector
Power Connector 4 Pin Molex
Remote Control USB 2.0 software included
Alarm LED Bias mode status
Dimensions 206 mm x 102.4 mm x 31.5 mm

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